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#4784244 - 06/11/18 07:40 PM 5w30 vs 10w30
Spitter Offline


Registered: 06/02/18
Posts: 33
Loc: Kentucky
If temps are above freezing could 10w30 offer more cold start protection than 5w30 in a vehicle that calls for 5w30? What temps would make 5w the better choice?
_________________________
2004 Silverado 5.3
Pennzoil ultra platinum 10w30 acdelco upf44
2006 Buick lucerne 3.8
Pennzoil ultra platinum 5w30 acdelco pf47

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#4784248 - 06/11/18 07:44 PM Re: 5w30 vs 10w30 [Re: Spitter]
SubieRubyRoo Offline


Registered: 05/14/12
Posts: 1125
Loc: Winchester, Indiana
they're both still a 30 weight, and 5wXX will flow more quickly. I'd go with quicker lubrication vs. thicker anytime.

That said, in KY you can likely use 10W30 year round if your vehicles are garaged.

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#4784252 - 06/11/18 07:48 PM Re: 5w30 vs 10w30 [Re: Spitter]
bbhero Offline


Registered: 03/20/15
Posts: 4613
Loc: Virginia
There would be no difference between the two around 32F or above. Zero difference. At say -15F the 5w would have an advantage for sure. The test for CCS and MRV for 10w is at -25C or -13F. So at -15F a 10w would be able to work. Though the 5w would be better given it's tested at -30C for CCS and tested at -35C for MRV.
_________________________
Nissan Altima 3.5 Coupe Valvoline Advanced Full Synthetic 5w30 Federated Auto 4612ex
"Treat your family like your friends and treat your friends like your family."

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#4784264 - 06/11/18 08:01 PM Re: 5w30 vs 10w30 [Re: Spitter]
Spitter Offline


Registered: 06/02/18
Posts: 33
Loc: Kentucky
A full syn 10w would flow better than a 5w conventional correct?
_________________________
2004 Silverado 5.3
Pennzoil ultra platinum 10w30 acdelco upf44
2006 Buick lucerne 3.8
Pennzoil ultra platinum 5w30 acdelco pf47

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#4784268 - 06/11/18 08:04 PM Re: 5w30 vs 10w30 [Re: Spitter]
bbhero Offline


Registered: 03/20/15
Posts: 4613
Loc: Virginia
No. Not at all. A 5w would flow better than a 10w unless it was very, very cold outside. Like -15F or colder.
_________________________
Nissan Altima 3.5 Coupe Valvoline Advanced Full Synthetic 5w30 Federated Auto 4612ex
"Treat your family like your friends and treat your friends like your family."

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#4784271 - 06/11/18 08:06 PM Re: 5w30 vs 10w30 [Re: Spitter]
Trav Offline


Registered: 11/20/06
Posts: 18845
Loc: MA, Mittelfranken.de
Check out the NOACK numbers on 10w30 they are usually lower than 5w30, In your part of the country this could result in less varnish and deposits in the intake tract. 5w30 will have no benefits over it.
_________________________
ASE L1, Master. Deutsch Meisterbrief.

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#4784283 - 06/11/18 08:18 PM Re: 5w30 vs 10w30 [Re: Trav]
bbhero Offline


Registered: 03/20/15
Posts: 4613
Loc: Virginia
Trav the funny thing I noticed with the PQIA test results for 10w30 showed that Warren Oil 10w30 had the best NOACK at 7.6. All of the others were above 10 up to 13. So a oil made by Warren Oil beat Havoline and the others.

I hope your eyes are doing ok. Take care of yourself.
_________________________
Nissan Altima 3.5 Coupe Valvoline Advanced Full Synthetic 5w30 Federated Auto 4612ex
"Treat your family like your friends and treat your friends like your family."

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#4784284 - 06/11/18 08:18 PM Re: 5w30 vs 10w30 [Re: Spitter]
BJD78 Offline


Registered: 08/05/17
Posts: 493
Loc: Nebraska
5w30 is going to flow much better at very cold temps -10, -20 and below,but lots of older vehicles used to use 10w30 and 10w40 and still start in -20, and even -30 temps. I grew up in North Dakota ..Fargo and back in 60's and 70's my dad started the big V8 F150 and our ford Galaxy many times in temps well below -20 with a few -30 temps tossed in with 10w40 in the sump. Of course he did use a battery heater and sometimes just a small shot of starting fluid , but they always started.

Now many newer vehicles of today use 0w20 which can go to even lower temps. I think that 0w20 is probably found only in synthetic or semi synthetic though. Anything colder than -30 and I am staying home.
_________________________
2010 Forester:122K
2009 Sonata :189K
2010 Tucson:55K

OCI 5K using the cheapest dino oil I can buy,usually NAPA or TSC Travelers oil.

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#4784303 - 06/11/18 08:37 PM Re: 5w30 vs 10w30 [Re: Spitter]
kschachn Online   content


Registered: 12/26/05
Posts: 9384
Loc: Upper Midwest
Originally Posted By: Spitter
A full syn 10w would flow better than a 5w conventional correct?

And its not about flow, its about pumpability. Both the synthetic and the conventional will pump down to the limit of pumpabilty for whatever the W rating happens to be, they both have to meet the same spec.
_________________________
1994 BMW 530i, 227K
1996 Honda Accord, 262K
1999 Toyota Sienna, 394K
2000 Toyota ECHO, 267K

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#4784339 - 06/11/18 09:06 PM Re: 5w30 vs 10w30 [Re: Spitter]
Bryanccfshr Offline


Registered: 10/09/04
Posts: 5716
Loc: Durango, Co
As long as the temperature is above the minimum pump ability limits of each oil. both oils will lubricate and circulate at the same speed. There is no difference. No additional protection from thinner, nothing. Pumpable is pumpable.
This myth of faster circulation is false.
_________________________
2018 Trd Pro 4Runner M1 0w40
2018 Tacoma off-road Castrol 5w30 Magnatec

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#4784496 - 06/12/18 04:14 AM Re: 5w30 vs 10w30 [Re: Spitter]
OilUzer Offline


Registered: 07/31/17
Posts: 136
Loc: WA
Some may argue as follow:

Doesn't 10W30 have less vii and possibly lower Noack?

Didn't we also have a recent thread about xWy and selecting lowest (y-x) that meets the spec.
Meaning to select the highest x that meets your W.

Therefore 10W-30 over 5W-30 if 10W meets your winter temp. requirements.

some may argue that we maybe splitting hairs ...

Having said that, I am 1000 miles into M1 EP 10W-30 and I like it VERY much! In winter i was using PPPP 5W30.

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#4784510 - 06/12/18 05:15 AM Re: 5w30 vs 10w30 [Re: OilUzer]
JLTD Offline


Registered: 12/15/17
Posts: 644
Loc: US
Originally Posted By: OilUzer
Some may argue as follow:

Doesn't 10W30 have less vii and possibly lower Noack?

Didn't we also have a recent thread about xWy and selecting lowest (y-x) that meets the spec.
Meaning to select the highest x that meets your W.

Therefore 10W-30 over 5W-30 if 10W meets your winter temp. requirements.

some may argue that we maybe splitting hairs ...

Having said that, I am 1000 miles into M1 EP 10W-30 and I like it VERY much! In winter i was using PPPP 5W30.





Yep, several threads on that lately. What's your vehicle spc'd for in the manual?

I'll be going 5w30, and once used up maybe 10w30 in the 4Runner which is spec'd 0w20 for CAFE.
_________________________
His: 2015 4Runner SR5 1GR-FE 37k, Amsoil OE 5w20/Wix
Testing vs Amsoil OE 5w30...then longer OCI on SS

Hers: 2008 Jeep Liberty 134k, Amsoil SS 5w30/Amsoil, minimum 10k oci

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#4784514 - 06/12/18 05:39 AM Re: 5w30 vs 10w30 [Re: JLTD]
OilUzer Offline


Registered: 07/31/17
Posts: 136
Loc: WA
Originally Posted By: JLTD
... What's your vehicle spc'd for in the manual?

I'll be going 5w30, and once used up maybe 10w30 in the 4Runner which is spec'd 0w20 for CAFE


Spec for this car is 5W-20 (recommended) or 5W-30 or 10W-30 and there is temp chart to select either 5W or 10W ...

I have never used 5W-20 and can use either 5W or 10W all year! They both meet the W spec in my area BUT I like to split hairs ... lol

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#4784516 - 06/12/18 05:41 AM Re: 5w30 vs 10w30 [Re: Spitter]
JLTD Offline


Registered: 12/15/17
Posts: 644
Loc: US
thumbsup Thanks--
_________________________
His: 2015 4Runner SR5 1GR-FE 37k, Amsoil OE 5w20/Wix
Testing vs Amsoil OE 5w30...then longer OCI on SS

Hers: 2008 Jeep Liberty 134k, Amsoil SS 5w30/Amsoil, minimum 10k oci

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#4784527 - 06/12/18 06:10 AM Re: 5w30 vs 10w30 [Re: Spitter]
SilverFusion2010 Offline


Registered: 06/29/11
Posts: 1657
Loc: Crawfordville FL
Id pick the 10w-30 unless you need the 5w cold rating for starting. 10w is considered good to 0F
_________________________
2010 Ford Fusion SE 3.0L V6, 178k miles M1 HM 10w-30

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